Drug interactions
Fosamprenavir + Metformin
Severity: Minor
Fosamprenavir and Metformin: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Protease inhibitors can induce insulin resistance and hyperglycemia, potentially reducing metformin's effect. Glycemic control may worsen in diabetic patients.
What this interaction means in plain words
Fosamprenavir and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Protease inhibitor-associated insulin resistance and impaired glucose metabolism oppose metformin.
What to do
Monitor glucose and HbA1c after starting fosamprenavir and titrate metformin as needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Metformin
Frequently asked questions
Can I take Fosamprenavir with Metformin?
MediHelp rates the interaction as minor. Fosamprenavir and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Protease inhibitors can induce insulin resistance and hyperglycemia, potentially reducing metformin's effect. Glycemic control may worsen in diabetic patients.
How serious is the interaction between Fosamprenavir and Metformin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor glucose and HbA1c after starting fosamprenavir and titrate metformin as needed.
What other medicines interact with Metformin?
MediHelp also lists interactions of Metformin with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Metformin page.
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